* bug#19292: 24.3; [PATCH] erc-server-ping-timer-alist now has at most one timer per buffer
@ 2014-12-06 22:49 Dima Kogan
[not found] ` <handler.19292.B.1417906179802.ack@debbugs.gnu.org>
2015-12-27 20:19 ` Lars Ingebrigtsen
0 siblings, 2 replies; 3+ messages in thread
From: Dima Kogan @ 2014-12-06 22:49 UTC (permalink / raw)
To: 19292
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This alist was meant to map buffers to timers, but the "push" function
was not checking for already-existing timers. This was causing a
flood of PINGs being queued (because more than one timer was inserting
those), and the flood-control logic would block those from going
through quickly.
This patch checks for existing timers in the alist before adding new
ones. If a timer already exists, it is cancelled and overwritten.
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From 421c00345c3407fff7044092c458316c6da870a6 Mon Sep 17 00:00:00 2001
From: Dima Kogan <dima@secretsauce.net>
Date: Sat, 6 Dec 2014 14:46:51 -0800
Subject: [PATCH] erc-server-ping-timer-alist now has at most one timer per
buffer
This alist was meant to map buffers to timers, but the "push" function
was not checking for already-existing timers. This was causing a
flood of PINGs being queued (because more than one timer was inserting
those), and the flood-control logic would block those from going
through quickly.
This patch checks for existing timers in the alist before adding new
ones. If a timer already exists, it is cancelled and overwritten.
---
lisp/erc/erc-backend.el | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/lisp/erc/erc-backend.el b/lisp/erc/erc-backend.el
index fb22f58..bedb20f 100644
--- a/lisp/erc/erc-backend.el
+++ b/lisp/erc/erc-backend.el
@@ -493,9 +493,19 @@ The current buffer is given by BUFFER."
4 erc-server-send-ping-interval
#'erc-server-send-ping
buffer))
- (setq erc-server-ping-timer-alist (cons (cons buffer
- erc-server-ping-handler)
- erc-server-ping-timer-alist)))))
+
+ ;; I check the timer alist for an existing timer. If one exists,
+ ;; I get rid of it
+ (let ((timer-tuple (assq buffer erc-server-ping-timer-alist)))
+ (if timer-tuple
+ ;; this buffer already has a timer. Cancel it and set the new one
+ (progn
+ (erc-cancel-timer (cdr timer-tuple))
+ (setf (cdr (assq buffer erc-server-ping-timer-alist)) erc-server-ping-handler))
+
+ ;; no existing timer for this buffer. Add new one
+ (add-to-list 'erc-server-ping-timer-alist
+ (cons buffer erc-server-ping-handler)))))))
(defun erc-server-process-alive (&optional buffer)
"Return non-nil when BUFFER has an `erc-server-process' open or running."
--
2.0.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* bug#19292: 24.3; [PATCH] erc-server-ping-timer-alist now has at most one timer per buffer
[not found] ` <handler.19292.B.1417906179802.ack@debbugs.gnu.org>
@ 2015-02-15 20:03 ` Dima Kogan
0 siblings, 0 replies; 3+ messages in thread
From: Dima Kogan @ 2015-02-15 20:03 UTC (permalink / raw)
To: 19292
Hi. This is a gentle ping. The attached patch made ERC usable for me,
and it would be great if it was merged. The added code is simply a
safety check.
Thanks
^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#19292: 24.3; [PATCH] erc-server-ping-timer-alist now has at most one timer per buffer
2014-12-06 22:49 bug#19292: 24.3; [PATCH] erc-server-ping-timer-alist now has at most one timer per buffer Dima Kogan
[not found] ` <handler.19292.B.1417906179802.ack@debbugs.gnu.org>
@ 2015-12-27 20:19 ` Lars Ingebrigtsen
1 sibling, 0 replies; 3+ messages in thread
From: Lars Ingebrigtsen @ 2015-12-27 20:19 UTC (permalink / raw)
To: Dima Kogan; +Cc: 19292
Dima Kogan <dima@secretsauce.net> writes:
> This alist was meant to map buffers to timers, but the "push" function
> was not checking for already-existing timers. This was causing a
> flood of PINGs being queued (because more than one timer was inserting
> those), and the flood-control logic would block those from going
> through quickly.
>
> This patch checks for existing timers in the alist before adding new
> ones. If a timer already exists, it is cancelled and overwritten.
Thanks; applied to Emacs 25.1.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 3+ messages in thread
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2014-12-06 22:49 bug#19292: 24.3; [PATCH] erc-server-ping-timer-alist now has at most one timer per buffer Dima Kogan
[not found] ` <handler.19292.B.1417906179802.ack@debbugs.gnu.org>
2015-02-15 20:03 ` Dima Kogan
2015-12-27 20:19 ` Lars Ingebrigtsen
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